GAMCO Investors, Inc. /quotes/comstock/13*!gbl/quotes/nls/gbl (GBL 43.37, -0.22, -0.51%) announced that the special dividend on its Class A and Class B common stock will be payable December 31, 2010, to stockholders of record on December 15, 2010. As previously disclosed, the special dividend will consist of $0.80 in cash and $3.20 in principal amount of the Company's 0% subordinated debentures due 2015 for each share of common stock (less any applicable withholding tax).